…we judge our past experiences almost entirely on how they were at their peak (pleasant or unpleasant) and how they ended. Other information is not lost, but it is not used. This includes net pleasantness or unpleasantness and how long the experience lasted.

…participants had two experiences of immersing one hand in painfully cold water.

The short trial lasted 60 s, with water temperature at 14 °C. The long trial lasted 90 s; the temperature was 14 °C for the first 60 s, then rose gradually to 15 °C over the next 30 s–still unpleasant, but a distinct improvement for most participants.

When they were later given a choice of which trial to repeat, a significant majority of participants chose to repeat the long trial. This preference violates logic, because adding pain to an aversive episode cannot make it better

A Possible Improvement on the Constructive Feedback Technique

Toastmasters uses a sandwich technique [good-bad-good], but the challenge is that the Serial position effect might cause the criticism necessary for improvement to be lost. However, this modified sandwich technique might provide the benefits of offering constructive criticism while still producing a more positive result at the end: